CN211477437U - Multi-path low-power-consumption temperature acquisition circuit - Google Patents
Multi-path low-power-consumption temperature acquisition circuit Download PDFInfo
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- CN211477437U CN211477437U CN201922011476.6U CN201922011476U CN211477437U CN 211477437 U CN211477437 U CN 211477437U CN 201922011476 U CN201922011476 U CN 201922011476U CN 211477437 U CN211477437 U CN 211477437U
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Abstract
The utility model provides a low-power consumption temperature acquisition circuit of multichannel, include: the device comprises M temperature sensor circuits, N switch control circuits, at least one display circuit, an alarm circuit and a microcontroller, wherein N is less than or equal to M; the M temperature sensor circuits are used for collecting temperature information in the environment and sending the temperature information to the microcontroller; the N switch control circuits are electrically connected with the microcontroller and are used for controlling a working power supply of the temperature sensor; the display circuit is used for displaying the temperatures corresponding to the M temperature sensor circuits; alarm circuit with the microcontroller electricity is connected and is used for the corresponding temperature that M temperature sensor circuit detected reports to the police when exceeding the settlement temperature, the utility model discloses the suitability is good, and linkage modules such as integrated warning cooling and consumption are lower.
Description
Technical Field
The utility model relates to a data acquisition technical field especially involves a low-power consumption temperature acquisition circuit of multichannel.
Background
The monitoring of the environmental temperature is an indispensable part in some industrial production or product detection, and the temperature detection device therein may be generally used in a severe use environment (such as high temperature, high humidity and the like), the temperature sensor in the temperature detection device may accelerate electromigration or aging of the material of the sensor body due to long-term power connection, which leads to shortening the service life cycle of the sensor or early failure, if a sensor power supply control circuit is added, the problem that the sensor is electrified for a long time can be effectively solved, the service life of the sensor is further prolonged, secondly, temperature information of a plurality of different points may need to be monitored simultaneously in some special environments, and a plurality of paths need to be monitored simultaneously, so that the current temperature detection device has poor applicability due to complete functions, and the common temperature acquisition circuit lacks a temperature alarming and cooling linkage part and cannot well meet the requirements of users.
In conclusion, how to provide a multi-path low-power-consumption temperature acquisition circuit which has good applicability, integrates linkage modules such as alarm and cooling and has low power consumption is a problem to be solved by technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned problems and needs, the present invention provides a multi-channel low power consumption temperature acquisition circuit, which can solve the above technical problems by adopting the following technical solutions.
In order to achieve the above object, the utility model provides a following technical scheme: a multi-channel low power consumption temperature acquisition circuit comprising: the device comprises M temperature sensor circuits, N switch control circuits, at least one display circuit, an alarm circuit and a microcontroller, wherein N is less than or equal to M; the M temperature sensor circuits are used for collecting temperature information in the environment and sending the temperature information to the microcontroller; the N switch control circuits are electrically connected with the microcontroller and are used for controlling a working power supply of the temperature sensor; the display circuit is used for displaying the temperatures corresponding to the M temperature sensor circuits; the alarm circuit is electrically connected with the microcontroller and used for giving an alarm when the corresponding temperature detected by the M temperature sensor circuits exceeds a set temperature.
Further, the output ports of the M temperature sensor circuits are all connected with an A/D conversion port of the microcontroller, and the microcontroller adopts a model STM32F205 RB.
Furthermore, the input ends of the N switch control circuits are connected with the IO port of the microcontroller, and the output ends of the N switch control circuits are connected with the negative ends of the power supplies of the plurality of temperature sensor circuits.
Furthermore, each temperature sensor circuit comprises a third resistor, a fourth resistor, a fifth resistor, a first diode, a second diode, a first capacitor and a second capacitor, the third resistor is an equivalent temperature sensor, one end of the third resistor is used as the negative end of the power supply of each temperature sensor circuit, the other end of the third resistor is connected in parallel with the anode of the first diode, the cathode of the second diode and one end of the fifth resistor, the fourth resistor is connected in parallel with the two ends of the first diode, the first capacitor is connected in parallel with the two ends of the second diode, the second capacitor is connected in parallel between the other end of the fifth resistor and the anode of the second diode, and the other end of the fifth resistor is connected with the A/D conversion port of the microcontroller.
Furthermore, each switch control circuit comprises a first resistor, a second resistor and a first field effect transistor, the grid of the first field effect transistor is connected with the IO port of the microcontroller in parallel after being connected with the first resistor, the second resistor is connected between the grid and the source of the first field effect transistor in parallel, and the drain of the first field effect transistor is connected with the negative end of the power supply of the plurality of temperature sensor circuits.
Further, the display circuit includes an integrated display driver ic l7107, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor and a display, the integrated display driver ic l7107 is electrically connected to the display, an input pin of the integrated display driver ic l7107 passes through the sixth capacitor and then is connected in parallel to one end of the fourteenth resistor, the other end of the fourteenth resistor is connected to a D/a port of the microcontroller, the ninth resistor is connected in parallel to a pin one of the integrated display driver ic l7107 and a common anode of the display, one end of the tenth resistor is connected in parallel to one end of the fourth capacitor, and the other end of the tenth resistor is connected to thirty-nine pin of the integrated display driver ic l7107, the other end of the fourth capacitor is connected with a pin thirty-eight of the integrated display driving chip ICL7107, one end of an eleventh resistor is connected with one end of a thirteenth resistor in parallel, one end of the thirteenth resistor is connected with a pin thirty-two of the integrated display driving chip ICL7107 in parallel, the other end of the eleventh resistor passes through a twelfth resistor and then is connected with a 5V power supply anode, and the pin twenty-six of the integrated display driving chip ICL7107 is connected with a 5V power supply cathode.
Further, alarm circuit includes music chip S1, sixth resistance, seventh resistance, cooling fan B1 and PNP type triode Q2, PNP type triode Q2 'S base passes through the sixth resistance with microcontroller' S IO port is connected, PNP type triode Q2 'S collecting electrode meets cooling fan B1' S one end, the one end of seventh resistance and music chip S1 'S input, cooling fan B1' S the other end of seventh resistance with music chip S1 'S output meets, PNP type triode Q2' S projecting pole ground connection.
The beneficial effects of the utility model are that, this utility model are that, the suitability is good, and linkage modules such as integrated warning cooling and consumption are lower, still can link to each other with the WIFI module through the microcontroller serial ports and carry out remote control, and different temperature detection circuit corresponds different temperature alarm music and can reach more nimble usage pattern.
The following description of the preferred embodiments for carrying out the present invention will be made in detail with reference to the accompanying drawings so that the features and advantages of the present invention can be easily understood.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments of the present invention will be briefly described below. The drawings are intended to depict only some embodiments of the invention, and not all embodiments of the invention are limited thereto.
Fig. 1 is a schematic circuit diagram of the middle temperature sensor circuit of the present invention.
Fig. 2 is a schematic circuit diagram of the display circuit of the present invention.
Fig. 3 is a schematic diagram of a connection structure of an expansion module in the embodiment.
Detailed Description
In order to make the technical solution of the present invention, its purpose, technical solution and advantages become clearer, the drawings of the embodiments of the present invention will be combined hereinafter, and the technical solution of the embodiments of the present invention will be clearly and completely described. Like reference symbols in the various drawings indicate like elements. It should be noted that the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive work based on the described embodiments of the present invention, belong to the protection scope of the present invention.
As shown in the accompanying drawing 1, the utility model provides a simple structure, interference immunity is good, and the suitability is good the low-power consumption temperature acquisition circuit of the multichannel of easily promoting, and the low-power consumption temperature acquisition circuit of this multichannel includes: the temperature control circuit comprises M temperature sensor circuits, N switch control circuits, at least one display circuit, an alarm circuit and a microcontroller, wherein N is less than or equal to M, in the embodiment, the microcontroller adopts a model STM32F205RB, the chip is provided with 16A/D conversion ports, 2D/A conversion ports and 51 IO ports, and the display circuit is used for displaying the temperature corresponding to the M temperature sensor circuits; the alarm circuit is electrically connected with the microcontroller and used for giving an alarm when the corresponding temperature detected by the M temperature sensor circuits exceeds a set temperature.
The M temperature sensor circuits are used for collecting temperature information in the environment and sending the temperature information to the microcontroller, and output ports of the M temperature sensor circuits are connected with an A/D conversion port of the microcontroller.
N switch control circuit with the microcontroller electricity is connected and is used for controlling temperature sensor's working power supply, N switch control circuit's input with microcontroller's IO port is connected, N switch control circuit's output meets with a plurality of temperature sensor circuit's power negative terminal, because in general detection circuitry, temperature sensor probably accelerates electromigration or ageing because of the material that long-time switch on made the sensor body, leads to shortening sensor life cycle or the condition of failing in advance, increases sensor switch control circuit, can solve the long-time circular telegram's of sensor the condition, extension sensor life.
As shown in fig. 1, each temperature sensor circuit includes a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first diode D1, a second diode D2, a first capacitor C1, and a second capacitor C2, the third resistor R3 is an equivalent temperature sensor, one end of the third resistor R3 is used as the negative power supply end of each temperature sensor circuit, the other end of the third resistor R3 is connected in parallel with the anode of the first diode D1, the cathode of the second diode D2 and one end of the fifth resistor R5, the fourth resistor R4 is connected in parallel across the first diode D1, the first capacitor C1 is connected in parallel across the second diode D2, the second capacitor C2 is connected in parallel between the other end of the fifth resistor R5 and the anode of the second diode D2, the other end of the fifth resistor R5 is connected with an A/D conversion port of the microcontroller; each switch control circuit comprises a first resistor R1, a second resistor R2 and a first field-effect tube Q1, the grid electrode of the first field-effect tube Q1 is connected with the IO port of the microcontroller after being connected with the first resistor R1 in parallel, the second resistor R2 is connected between the grid electrode and the source electrode of the first field-effect tube Q1 in parallel, and the drain electrode of the first field-effect tube Q1 is connected with the negative power supply terminals of the plurality of temperature sensor circuits; the alarm circuit comprises a music chip S1, a sixth resistor, a seventh resistor, a cooling fan B1 and a PNP triode Q2, wherein the base electrode of the PNP triode Q2 is connected with the IO port of the microcontroller through the sixth resistor, the collector electrode of the PNP triode Q2 is connected with one end of the cooling fan B1, one end of the seventh resistor and the input end of the music chip S1 in parallel, the other end of the cooling fan B1, the other end of the seventh resistor and the output end of the music chip S1 are connected in parallel, the emitter electrode of the PNP triode Q2 is grounded, and in the circuit, the Q1 is a switch with low on-state internal resistance and used for controlling the on-off of a power ground Vss and GND of the temperature sensor circuit; the R1 and the R2 form a voltage division circuit, so that when the I/O port of the MCU is at a high level, the grid voltage of the Q1 is higher than the action voltage threshold VGS of the source, and the Q1 is reliably conducted; r3 and R4 form a voltage divider circuit, and D7 and D8 are clamping diodes, so that the voltage of the input port is not more than VCC and not less than 0V.
As shown in fig. 2, the display circuit includes an integrated display driver ic l7107, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, and a four-bit digital display, the integrated display driver ic l7107 is electrically connected to the four-bit digital display, an input terminal pin thirty of the integrated display driver ic l7107 is connected in parallel to one terminal of the fourteenth resistor R14 after passing through the sixth capacitor C6, the other terminal of the fourteenth resistor R14 is connected to the D/a port of the microcontroller, the ninth resistor R9 is connected in parallel to the one terminal of the integrated display driver ic l7107 and the common anode of the four-bit digital display, the tenth resistor R10 is connected in parallel to the fourth terminal R4, the other end of the tenth resistor R10 is connected with a pin thirty-nine of the integrated display driving chip ICL7107, the other end of the fourth capacitor C4 is connected with a pin thirty-eight of the integrated display driving chip ICL7107, one end of the eleventh resistor R11 is connected with one end of the thirteenth resistor R13 in parallel, one end of the thirteenth resistor R13 is connected with a pin thirty-two of the integrated display driving chip ICL7107 in parallel, the other end of the eleventh resistor R11 is connected with a 5V power supply anode after passing through the twelfth resistor R12, and the pin twenty-six of the integrated display driving chip ICL7107 is connected with a 5V power supply cathode.
In this embodiment, because of the multi-path temperature signal acquisition, the structure of the temperature acquisition circuit can be expanded to other temperature acquisition circuits with different structures as long as the negative terminal is connected with the switch control circuit and the output terminal is connected with the IO port of the microcontroller; as shown in fig. 3, the alarm circuit therein can also be replaced by a voice reminding module, a WIFI module can be added to realize remote communication, the WIFI module can be directly connected and communicated with a microprocessor through a serial port, if the circuit works, the cooling device needs to be linked for cooling the ambient temperature, and the operation of the cooling device can also be controlled by different voltage signals through an IO port of the microcontroller.
It should be noted that the embodiments of the present invention are only the preferred embodiments for implementing the present invention, and all the obvious modifications and changes belonging to the overall concept of the present invention should fall within the protection scope of the present invention.
Claims (7)
1. A multi-channel low-power consumption temperature acquisition circuit is characterized by comprising: the device comprises M temperature sensor circuits, N switch control circuits, at least one display circuit, an alarm circuit and a microcontroller, wherein N is less than or equal to M; the M temperature sensor circuits are used for collecting temperature information in the environment and sending the temperature information to the microcontroller; the N switch control circuits are electrically connected with the microcontroller and are used for controlling a working power supply of the temperature sensor; the display circuit is used for displaying the temperatures corresponding to the M temperature sensor circuits; the alarm circuit is electrically connected with the microcontroller and used for giving an alarm when the corresponding temperature detected by the M temperature sensor circuits exceeds a set temperature.
2. The multi-channel low-power consumption temperature acquisition circuit according to claim 1, wherein output ports of the M temperature sensor circuits are connected to an a/D conversion port of the microcontroller, and the microcontroller adopts a model number STM32F205 RB.
3. The multi-channel low-power-consumption temperature acquisition circuit according to claim 1, wherein the input ends of the N switch control circuits are connected to the IO port of the microcontroller, and the output ends of the N switch control circuits are connected to the negative power supply ends of the plurality of temperature sensor circuits.
4. The multi-channel low power consumption temperature acquisition circuit of claim 2, wherein each temperature sensor circuit comprises a third resistor, a fourth resistor, a fifth resistor, a first diode, a second diode, a first capacitor and a second capacitor, the third resistor is an equivalent temperature sensor, one end of the third resistor is used as the negative end of the power supply of each temperature sensor circuit, the other end of the third resistor is connected in parallel with the anode of the first diode, the cathode of the second diode and one end of the fifth resistor, the fourth resistor is connected in parallel with two ends of the first diode, the first capacitor is connected in parallel with two ends of the second diode, the second capacitor is connected in parallel between the other end of the fifth resistor and the anode of the second diode, the other end of the fifth resistor is connected with an A/D conversion port of the microcontroller.
5. The multi-channel low-power-consumption temperature acquisition circuit according to claim 3, wherein each switch control circuit comprises a first resistor, a second resistor and a first field-effect transistor, a gate of the first field-effect transistor is connected with an IO port of the microcontroller after being connected with the first resistor in parallel, the second resistor is connected between the gate and a source of the first field-effect transistor in parallel, and a drain of the first field-effect transistor is connected with a negative power supply terminal of the plurality of temperature sensor circuits.
6. The multi-channel low-power temperature acquisition circuit according to claim 1, wherein the display circuit comprises an integrated display driver ic l7107, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor and a display, the integrated display driver ic l7107 is electrically connected to the display, an input pin of the integrated display driver ic l7107 passes through the sixth capacitor and then is connected in parallel to one end of the fourteenth resistor, the other end of the fourteenth resistor is connected to a D/a port of the microcontroller, the ninth resistor is connected in parallel between a pin one of the integrated display driver ic l7107 and a common anode of the display, one end of the tenth resistor is connected in parallel to one end of the fourth capacitor, the other end of the tenth resistor is connected with a pin thirty-nine of the integrated display driving chip ICL7107, the other end of the fourth capacitor is connected with a pin thirty-eight of the integrated display driving chip ICL7107, one end of the eleventh resistor is connected with one end of the thirteenth resistor in parallel, one end of the thirteenth resistor is connected with a pin thirty-two of the integrated display driving chip ICL7107 in parallel, the other end of the eleventh resistor passes through the twelfth resistor and then is connected with a 5V power supply anode, and the pin twenty-six of the integrated display driving chip ICL7107 is connected with a 5V power supply cathode.
7. The multi-channel low-power-consumption temperature acquisition circuit according to claim 1, wherein the alarm circuit comprises a music chip S1, a sixth resistor, a seventh resistor, a cooling fan B1 and a PNP triode Q2, the base of the PNP triode Q2 is connected with the IO port of the microcontroller through the sixth resistor, the collector of the PNP triode Q2 is connected in parallel with one end of the cooling fan B1, one end of the seventh resistor and the input end of the music chip S1, the other end of the cooling fan B1, the other end of the seventh resistor and the output end of the music chip S1 are connected in parallel, and the emitter of the PNP triode Q2 is grounded.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922011476.6U CN211477437U (en) | 2019-11-20 | 2019-11-20 | Multi-path low-power-consumption temperature acquisition circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922011476.6U CN211477437U (en) | 2019-11-20 | 2019-11-20 | Multi-path low-power-consumption temperature acquisition circuit |
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| CN211477437U true CN211477437U (en) | 2020-09-11 |
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| CN201922011476.6U Active CN211477437U (en) | 2019-11-20 | 2019-11-20 | Multi-path low-power-consumption temperature acquisition circuit |
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Effective date of registration: 20220816 Address after: Room 12015, 20th Floor, Unit 1, Building 24, Linyintianxia, No. 1 West Avenue, High-tech Zone, Xi'an City, Shaanxi Province 710000 Patentee after: Xi'an Kaitian Electronic Technology Co., Ltd. Address before: No.753, Liucheng Liudong, Nanan City, Quanzhou City, Fujian Province, 362000 Patentee before: NANAN PINGFENG AGRICULTURAL SCIENCE AND TECHNOLOGY Co.,Ltd. |